Patterns And Relations Worksheet - Grade 7 Page 16
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46Evaluate each expression by replacing x with 4.
7.
a) x
5
b) 3x
c) 2x
1
x
d)
e) 3x
1
f) 20
2x
2
Evaluate each expression by replacing z with 7.
8.
a) z
12
b) 10
z
c) 5z
z
d) 3z
3
e) 35
2z
f) 3
7
Assessment Focus Jason works at a local
9.
fish and chips restaurant.
He earns $7/h during the week, and $9/h on
the weekend.
a) Jason works 8 h during the week and
12 h on the weekend.
Write an expression for his earnings.
b) Jason works x hours during the week and
5 h on the weekend.
Write an expression for his earnings.
c) Jason needs $115 to buy sports equipment.
He worked 5 h on the weekend.
How many hours does Jason have to work
during the week to have the money he needs?
Take It Further
A value of n is substituted in each expression
10.
to get the number in the box.
Find each value of n.
a) 5n
30
b) 3n
1
11
c) 4n
7
15
d) 5n
4
11
n
e) 4
6n
40
f)
5
8
Explain why it is important to use the order of operations
when evaluating an algebraic expression.
Use an example in your explanation.
19
1.3 Algebraic Expressions
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